Android 替身版Android插件化方案

文章目录 [隐藏]

示例代码：
https://gitee.com/vigiles/ghost-plugin-demo

1.项目

1.1.宿主

打开AndroidStudio，新建项目，PhoneAndTablet项目。

填写配置信息。

默认入口宿主模块是app。

1.2.中间人

创建一个新的模块。

模块类型是Library。填写模块名及其它配置。

模块内默认为空。

1.3.插件

新建模块。

类型和入口模块相同，PhoneAndTablet。

模块自动创建默认的入口Activity。

1.4.添加依赖

配置项目结构。

依赖面板，选择宿主模块和插件模块，添加其依赖模块为中间人模块。

选择中间人模块。

确定，依赖列表出现中间人。

即在宿主和插件的gradle里添加引用中间人。

2.中间人

充当桥梁，标准。插件依据此标准创造；宿主依据此标准调用。

2.1.工具类

职责是加载插件apk，并创造专属的各种上下文相关对象。并同时被插件和宿主使用。

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.res.AssetManager;
import android.content.res.Resources;
import android.util.Log;
import java.io.File;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import dalvik.system.DexClassLoader;

public class PluginManager {
    
    private static PluginManager instance = new PluginManager();
    
    private Context context;
    private DexClassLoader dexClassLoader;
    private PackageInfo packageInfo;
    private Resources resources;
    
    private PluginManager() {
    }
    
    public static PluginManager getInstance() {
        return instance;
    }
    
    /**
     * 传入当前应用(宿主)的ctx
     *
     * @param context 宿主的ctx
     */
    public void setContext(Context context) {
        this.context = context;
        Log.e("ard", "中间人：向我的插件mng放了 context");
    }
    
    /**
     * 加载插件apk文件
     *
     * @param path 文件路径
     */
    public void loadPluginApkFile(String path) {
        File outDexFile = context.getDir("dex", Context.MODE_PRIVATE);                                           // 当前应用(宿主)的内部私有存储路径
        dexClassLoader = new DexClassLoader(path, outDexFile.getAbsolutePath(), null, context.getClassLoader()); // 插件apk的类加载器
        PackageManager packageManager = context.getPackageManager();                                             // 包管理器-系统级单例
        packageInfo = packageManager.getPackageArchiveInfo(path, PackageManager.GET_ACTIVITIES);                 // 插件apk内的全部aty
        try {
            Class<AssetManager> assetManagerClass = AssetManager.class;
            AssetManager assetManager = assetManagerClass.newInstance(); // 创建一个AssetManager
            Method addAssetPath = assetManagerClass.getMethod("addAssetPath", String.class);
            addAssetPath.invoke(assetManager, path);                     // 给AssetManager设置apk路径
            Resources resources = context.getResources();
            this.resources = new Resources(assetManager, resources.getDisplayMetrics(), resources.getConfiguration()); // 插件apk的Resource
        } catch (InstantiationException e) {
            Log.e("ard", "中间人：assetsmng实例化错误：" + e.getMessage());
        } catch (IllegalAccessException e) {
            Log.e("ard", "中间人：assetsmng实例反射方法调用非法：" + e.getMessage());
        } catch (NoSuchMethodException e) {
            Log.e("ard", "中间人：assetsmng实例反射方法错误：" + e.getMessage());
        } catch (InvocationTargetException e) {
            Log.e("ard", "中间人：assetsmng实例反射方法调用错误" + e.getMessage());
        }
        Log.e("ard", "中间人：我的插件mng加载了插件apk");
    }
    
    public DexClassLoader getDexClassLoader() {
        Log.e("ard", "中间人：从我的插件mng拿了 DexClassLoader");
        return dexClassLoader;
    }
    
    public PackageInfo getPackageInfo() {
        Log.e("ard", "中间人：从我的插件mng拿了 PackageInfo");
        return packageInfo;
    }
    
    public Resources getResources() {
        Log.e("ard", "中间人：从我的插件mng拿了 Resources");
        return resources;
    }
}

import android.content.Context;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.content.res.AssetManager;

import android.content.res.Resources;

import android.util.Log;

import java.io.File;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import dalvik.system.DexClassLoader;

public class PluginManager {

private static PluginManager instance = new PluginManager();

private Context context;

private DexClassLoader dexClassLoader;

private PackageInfo packageInfo;

private Resources resources;

private PluginManager() {

}

public static PluginManager getInstance() {

return instance;

}

/**

* 传入当前应用(宿主)的ctx

* @param context 宿主的ctx

public void setContext(Context context) {

this.context = context;

Log.e("ard", "中间人：向我的插件mng放了 context");

}

/**

* 加载插件apk文件

* @param path 文件路径

public void loadPluginApkFile(String path) {

File outDexFile = context.getDir("dex", Context.MODE_PRIVATE); // 当前应用(宿主)的内部私有存储路径

dexClassLoader = new DexClassLoader(path, outDexFile.getAbsolutePath(), null, context.getClassLoader()); // 插件apk的类加载器

PackageManager packageManager = context.getPackageManager(); // 包管理器-系统级单例

packageInfo = packageManager.getPackageArchiveInfo(path, PackageManager.GET_ACTIVITIES); // 插件apk内的全部aty

try {

Class<AssetManager> assetManagerClass = AssetManager.class;

AssetManager assetManager = assetManagerClass.newInstance(); // 创建一个AssetManager

Method addAssetPath = assetManagerClass.getMethod("addAssetPath", String.class);

addAssetPath.invoke(assetManager, path); // 给AssetManager设置apk路径

Resources resources = context.getResources();

this.resources = new Resources(assetManager, resources.getDisplayMetrics(), resources.getConfiguration()); // 插件apk的Resource

} catch (InstantiationException e) {

Log.e("ard", "中间人：assetsmng实例化错误：" + e.getMessage());

} catch (IllegalAccessException e) {

Log.e("ard", "中间人：assetsmng实例反射方法调用非法：" + e.getMessage());

} catch (NoSuchMethodException e) {

Log.e("ard", "中间人：assetsmng实例反射方法错误：" + e.getMessage());

} catch (InvocationTargetException e) {

Log.e("ard", "中间人：assetsmng实例反射方法调用错误" + e.getMessage());

}

Log.e("ard", "中间人：我的插件mng加载了插件apk");

}

public DexClassLoader getDexClassLoader() {

Log.e("ard", "中间人：从我的插件mng拿了 DexClassLoader");

return dexClassLoader;

}

public PackageInfo getPackageInfo() {

Log.e("ard", "中间人：从我的插件mng拿了 PackageInfo");

return packageInfo;

}

public Resources getResources() {

Log.e("ard", "中间人：从我的插件mng拿了 Resources");

return resources;

}

2.2.插件的接口

即插件的建造标准、宿主的使用标准。目的在于接管插件的生命周期。

import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.res.AssetManager;
import android.content.res.Resources;
import android.os.Bundle;
import android.os.Looper;
import android.os.PersistableBundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import androidx.appcompat.app.AppCompatActivity;
import java.util.concurrent.Executor;

/**
 * Activity的生命周期接口
 * 插件的Activity都须实现此接口
 */
public interface IPluginActivity {
    public void attach(AppCompatActivity rootActivity);
    public void onCreate( Bundle savedInstanceState);
    public void onNewIntent(Intent intent);
    public void onStart();
    public void onRestart();
    public void onResume();
    public void onPause();
    public void onStop();
    public void onDestroy();
    public void setContentView(View view);
    public void setContentView(int layoutResID);
    public <T extends View> T findViewById(int id);
    public Intent getIntent();
    public void onSaveInstanceState(Bundle outState);
    public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState);
    public boolean onKeyDown(int keyCode, KeyEvent event);
    public void onBackPressed();
    public void onTouchEvent();
    public LayoutInflater getLayoutInflater();
    public ClassLoader getClassLoader();
    public Context getBaseContext();
    public AssetManager getAssets();
    public Resources getResources();
    public PackageManager getPackageManager();
    public ContentResolver getContentResolver();
    public Looper getMainLooper();
    public Executor getMainExecutor();
    public Context getApplicationContext();
    public void startActivity(Intent intent);
    public void startActivityForResult(Intent intent, int requestCode);
    public WindowManager getWindowManager();
    public ApplicationInfo getApplicationInfo();
    public Window getWindow();
}

import android.content.ContentResolver;

import android.content.Context;

import android.content.Intent;

import android.content.pm.ApplicationInfo;

import android.content.pm.PackageManager;

import android.content.res.AssetManager;

import android.content.res.Resources;

import android.os.Bundle;

import android.os.Looper;

import android.os.PersistableBundle;

import android.view.KeyEvent;

import android.view.LayoutInflater;

import android.view.View;

import android.view.Window;

import android.view.WindowManager;

import androidx.appcompat.app.AppCompatActivity;

import java.util.concurrent.Executor;

/**

* Activity的生命周期接口

* 插件的Activity都须实现此接口

public interface IPluginActivity {

public void attach(AppCompatActivity rootActivity);

public void onCreate( Bundle savedInstanceState);

public void onNewIntent(Intent intent);

public void onStart();

public void onRestart();

public void onResume();

public void onPause();

public void onStop();

public void onDestroy();

public void setContentView(View view);

public void setContentView(int layoutResID);

public <T extends View> T findViewById(int id);

public Intent getIntent();

public void onSaveInstanceState(Bundle outState);

public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState);

public boolean onKeyDown(int keyCode, KeyEvent event);

public void onBackPressed();

public void onTouchEvent();

public LayoutInflater getLayoutInflater();

public ClassLoader getClassLoader();

public Context getBaseContext();

public AssetManager getAssets();

public Resources getResources();

public PackageManager getPackageManager();

public ContentResolver getContentResolver();

public Looper getMainLooper();

public Executor getMainExecutor();

public Context getApplicationContext();

public void startActivity(Intent intent);

public void startActivityForResult(Intent intent, int requestCode);

public WindowManager getWindowManager();

public ApplicationInfo getApplicationInfo();

public Window getWindow();

}

2.3.接口实现类

每个插件的Activity都要实现标准，这里统统实现作为父类，简化代码。

import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.res.AssetManager;
import android.content.res.Resources;
import android.os.Build;
import android.os.Bundle;
import android.os.Looper;
import android.os.PersistableBundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import java.util.concurrent.Executor;

/*
 * 插件不是系统加载的，没有天生的生命周期。
 * 实现IPluginActivityLifecycle，强加生命，赋予上下文。
 *
 * */
public class BasePluginActivity extends AppCompatActivity implements IPluginActivity {
    
    /* 通过中间人传入的应用(宿主)的上下文 */
    protected AppCompatActivity that;
    
    @Override
    public void attach(AppCompatActivity rootActivity) {
        that = rootActivity;
        Log.e("ard", "中间人base：获得上下文：" + that.getClass().getSimpleName());
    }
    
    @Override
    public void setContentView(View view) {
        if (null == that) {
            super.setContentView(view);
        } else {
            that.setContentView(view);
        }
        Log.e("ard", "中间人base：执行：setContentView(View view)");
    }
    
    @Override
    public void setContentView(int layoutResID) {
        that.setContentView(layoutResID);
        Log.e("ard", "中间人base：执行：setContentView(int layoutResID)");
    }
    
    @Override
    public <T extends View> T findViewById(int id) {
        Log.e("ard", "中间人base：执行：View findViewById(int id)");
        return that.findViewById(id);
    }
    
    @Override
    public Intent getIntent() {
        Log.e("ard", "中间人base：执行：Intent getIntent()");
        return that.getIntent();
    }
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        Log.e("ard", "中间人base：执行：onCreate(Bundle savedInstanceState)");
    }
    
    @Override
    public void onStart() {
        Log.e("ard", "中间人base：执行：onStart()");
    }
    
    @Override
    public void onRestart() {
        Log.e("ard", "中间人base：执行：onRestart()");
    }
    
    @Override
    public void onNewIntent(Intent intent) {
        Log.e("ard", "中间人base：执行：onNewIntent(intent)");
    }
    
    @Override
    public void onResume() {
        Log.e("ard", "中间人base：执行：onResume()");
    }
    
    @Override
    public void onPause() {
        Log.e("ard", "中间人base：执行：onPause()");
    }
    
    @Override
    public void onStop() {
        Log.e("ard", "中间人base：执行：onStop()");
    }
    
    @Override
    public void onDestroy() {
        Log.e("ard", "中间人base：执行：onDestroy()");
    }
    
    @Override
    public void onSaveInstanceState(Bundle outState) {
        Log.e("ard", "中间人base：执行：onSaveInstanceState(outState)");
    }
    
    @Override
    public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {
        Log.e("ard", "中间人base：执行：onSaveInstanceState(outState, outPersistentState)");
    }
    
    @Override
    public void onTouchEvent() {
        Log.e("ard", "中间人base：执行：onTouchEvent()");
    }
    
    @Override
    public LayoutInflater getLayoutInflater() {
        Log.e("ard", "中间人base：执行：LayoutInflater getLayoutInflater()");
        return that.getWindow().getLayoutInflater();
    }
    
    @Override
    public ClassLoader getClassLoader() {
        Log.e("ard", "中间人base：执行：ClassLoader getClassLoader()");
        return PluginManager.getInstance().getDexClassLoader();
    }
    
    public Context getBaseContext() {
        Log.e("ard", "中间人base：执行：Context getBaseContext()");
        return that.getBaseContext();
    }
    
    @Override
    public AssetManager getAssets() {
        Log.e("ard", "中间人base：执行：AssetManager getAssets()");
        return that.getAssets();
    }
    
    @Override
    public Resources getResources() {
        Log.e("ard", "中间人base：执行：Resources getResources()");
        return PluginManager.getInstance().getResources();
    }
    
    @Override
    public PackageManager getPackageManager() {
        Log.e("ard", "中间人base：执行：PackageManager getPackageManager()");
        return that.getPackageManager();
    }
    
    @Override
    public ContentResolver getContentResolver() {
        Log.e("ard", "中间人base：执行：ContentResolver getContentResolver()");
        return that.getContentResolver();
    }
    
    @Override
    public Looper getMainLooper() {
        Log.e("ard", "中间人base：执行：Looper getMainLooper()");
        return that.getMainLooper();
    }
    
    @RequiresApi(api = Build.VERSION_CODES.P)
    @Override
    public Executor getMainExecutor() {
        Log.e("ard", "中间人base：执行：Executor getMainExecutor()");
        return that.getMainExecutor();
    }
    
    @Override
    public Context getApplicationContext() {
        Log.e("ard", "中间人base：执行：Context getApplicationContext()");
        return that.getApplicationContext();
    }
    
    @Override
    public void startActivity(Intent intent) {
        Intent i = new Intent();
        i.putExtra("className", intent.getComponent().getClassName());
        that.startActivity(i);
        Log.e("ard", "中间人base：执行：startActivity(Intent intent)");
    }
    
    @Override
    public void startActivityForResult(Intent intent, int requestCode) {
        Intent i = new Intent();
        i.putExtra("className", intent.getComponent().getClassName());
        that.startActivityForResult(i, requestCode);
        Log.e("ard", "中间人base：执行：startActivityForResult(intent, requestCode)");
    }
    
    @Override
    public WindowManager getWindowManager() {
        Log.e("ard", "中间人base：执行：WindowManager getWindowManager()");
        return that.getWindowManager();
    }
    
    @Override
    public ApplicationInfo getApplicationInfo() {
        Log.e("ard", "中间人base：执行：ApplicationInfo getApplicationInfo()");
        return that.getApplicationInfo();
    }
    
    @Override
    public Window getWindow() {
        Log.e("ard", "中间人base：执行：Window getWindow()");
        return that.getWindow();
    }
}

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import android.content.ContentResolver;

import android.content.Context;

import android.content.Intent;

import android.content.pm.ApplicationInfo;

import android.content.pm.PackageManager;

import android.content.res.AssetManager;

import android.content.res.Resources;

import android.os.Build;

import android.os.Bundle;

import android.os.Looper;

import android.os.PersistableBundle;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.View;

import android.view.Window;

import android.view.WindowManager;

import androidx.annotation.RequiresApi;

import androidx.appcompat.app.AppCompatActivity;

import java.util.concurrent.Executor;

* 插件不是系统加载的，没有天生的生命周期。

* 实现IPluginActivityLifecycle，强加生命，赋予上下文。

* */

public class BasePluginActivity extends AppCompatActivity implements IPluginActivity {

/* 通过中间人传入的应用(宿主)的上下文 */

protected AppCompatActivity that;

@Override

public void attach(AppCompatActivity rootActivity) {

that = rootActivity;

Log.e("ard", "中间人base：获得上下文：" + that.getClass().getSimpleName());

}

@Override

public void setContentView(View view) {

if (null == that) {

super.setContentView(view);

} else {

that.setContentView(view);

}

Log.e("ard", "中间人base：执行：setContentView(View view)");

}

@Override

public void setContentView(int layoutResID) {

that.setContentView(layoutResID);

Log.e("ard", "中间人base：执行：setContentView(int layoutResID)");

}

@Override

public <T extends View> T findViewById(int id) {

Log.e("ard", "中间人base：执行：View findViewById(int id)");

return that.findViewById(id);

}

@Override

public Intent getIntent() {

Log.e("ard", "中间人base：执行：Intent getIntent()");

return that.getIntent();

}

@Override

public void onCreate(Bundle savedInstanceState) {

Log.e("ard", "中间人base：执行：onCreate(Bundle savedInstanceState)");

}

@Override

public void onStart() {

Log.e("ard", "中间人base：执行：onStart()");

}

@Override

public void onRestart() {

Log.e("ard", "中间人base：执行：onRestart()");

}

@Override

public void onNewIntent(Intent intent) {

Log.e("ard", "中间人base：执行：onNewIntent(intent)");

}

@Override

public void onResume() {

Log.e("ard", "中间人base：执行：onResume()");

}

@Override

public void onPause() {

Log.e("ard", "中间人base：执行：onPause()");

}

@Override

public void onStop() {

Log.e("ard", "中间人base：执行：onStop()");

}

@Override

public void onDestroy() {

Log.e("ard", "中间人base：执行：onDestroy()");

}

@Override

public void onSaveInstanceState(Bundle outState) {

Log.e("ard", "中间人base：执行：onSaveInstanceState(outState)");

}

@Override

public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {

Log.e("ard", "中间人base：执行：onSaveInstanceState(outState, outPersistentState)");

}

@Override

public void onTouchEvent() {

Log.e("ard", "中间人base：执行：onTouchEvent()");

}

@Override

public LayoutInflater getLayoutInflater() {

Log.e("ard", "中间人base：执行：LayoutInflater getLayoutInflater()");

return that.getWindow().getLayoutInflater();

}

@Override

public ClassLoader getClassLoader() {

Log.e("ard", "中间人base：执行：ClassLoader getClassLoader()");

return PluginManager.getInstance().getDexClassLoader();

}

public Context getBaseContext() {

Log.e("ard", "中间人base：执行：Context getBaseContext()");

return that.getBaseContext();

}

@Override

public AssetManager getAssets() {

Log.e("ard", "中间人base：执行：AssetManager getAssets()");

return that.getAssets();

}

@Override

public Resources getResources() {

Log.e("ard", "中间人base：执行：Resources getResources()");

return PluginManager.getInstance().getResources();

}

@Override

public PackageManager getPackageManager() {

Log.e("ard", "中间人base：执行：PackageManager getPackageManager()");

return that.getPackageManager();

}

@Override

public ContentResolver getContentResolver() {

Log.e("ard", "中间人base：执行：ContentResolver getContentResolver()");

return that.getContentResolver();

}

@Override

public Looper getMainLooper() {

Log.e("ard", "中间人base：执行：Looper getMainLooper()");

return that.getMainLooper();

}

@RequiresApi(api = Build.VERSION_CODES.P)

@Override

public Executor getMainExecutor() {

Log.e("ard", "中间人base：执行：Executor getMainExecutor()");

return that.getMainExecutor();

}

@Override

public Context getApplicationContext() {

Log.e("ard", "中间人base：执行：Context getApplicationContext()");

return that.getApplicationContext();

}

@Override

public void startActivity(Intent intent) {

Intent i = new Intent();

i.putExtra("className", intent.getComponent().getClassName());

that.startActivity(i);

Log.e("ard", "中间人base：执行：startActivity(Intent intent)");

}

@Override

public void startActivityForResult(Intent intent, int requestCode) {

Intent i = new Intent();

i.putExtra("className", intent.getComponent().getClassName());

that.startActivityForResult(i, requestCode);

Log.e("ard", "中间人base：执行：startActivityForResult(intent, requestCode)");

}

@Override

public WindowManager getWindowManager() {

Log.e("ard", "中间人base：执行：WindowManager getWindowManager()");

return that.getWindowManager();

}

@Override

public ApplicationInfo getApplicationInfo() {

Log.e("ard", "中间人base：执行：ApplicationInfo getApplicationInfo()");

return that.getApplicationInfo();

}

@Override

public Window getWindow() {

Log.e("ard", "中间人base：执行：Window getWindow()");

return that.getWindow();

}

3.插件

插件即普通的安卓应用。按照平常开发即可。但因为须要实现中间人规定的接口，单独运行会出问题。

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.cuiweiyou.pluginapp">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.RootApp">

        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".SecondActivity"/>
    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.cuiweiyou.pluginapp">

<application

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:roundIcon="@mipmap/ic_launcher_round"

android:supportsRtl="true"

android:theme="@style/Theme.RootApp">

<activity

android:name=".MainActivity"

android:exported="true">

<intent-filter>

</intent-filter>

</activity>

</application>

</manifest>

3.1.入口Activity

这里继承的是中间人的BasePluginActivity，实际还是普通的Activity。但个别之处有问题。

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import com.cuiweiyou.middleman.BasePluginActivity;

public class MainActivity extends BasePluginActivity implements View.OnClickListener {
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_one);
        
        findViewById(R.id.tv).setOnClickListener(this);
    }
    
    // 不能使用布局文件中配置android:onClick的形式。
    @Override
    public void onClick(View v) {
        Log.e("ard", "插件：点击，下一个aty");
        Intent i = new Intent(that, SecondActivity.class);
        startActivity(i);
    }
}

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import com.cuiweiyou.middleman.BasePluginActivity;

public class MainActivity extends BasePluginActivity implements View.OnClickListener {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_one);

findViewById(R.id.tv).setOnClickListener(this);

}

// 不能使用布局文件中配置android:onClick的形式。

@Override

public void onClick(View v) {

Log.e("ard", "插件：点击，下一个aty");

Intent i = new Intent(that, SecondActivity.class);

startActivity(i);

}

3.2.被调起Activity

继承BasePluginActivity。

import android.os.Bundle;
import com.cuiweiyou.middleman.BasePluginActivity;

public class SecondActivity extends BasePluginActivity {
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_two);
    }
    
}

import android.os.Bundle;

import com.cuiweiyou.middleman.BasePluginActivity;

public class SecondActivity extends BasePluginActivity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_two);

}

4.宿主

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.cuiweiyou.rootapp">

    <!-- 插件apk通常在sdcard上 -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.RootApp">

        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <!-- 替身aty -->
        <activity android:name=".GhostActivity"/>
    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.cuiweiyou.rootapp">

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<application

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:roundIcon="@mipmap/ic_launcher_round"

android:supportsRtl="true"

android:theme="@style/Theme.RootApp">

<activity

android:name=".MainActivity"

android:exported="true">

<intent-filter>

</intent-filter>

</activity>

</application>

</manifest>

4.1.插件的替身

想调用插件，就调用替身。用替身管理插件的生命周期。

import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import com.cuiweiyou.middleman.IPluginActivity;
import com.cuiweiyou.middleman.PluginManager;

/*
 * 替身Activity。通过这个aty跳转到插件的aty。
 * 必须注册到宿主的Manifest。
 */
public class GhostActivity extends AppCompatActivity {
    
    private IPluginActivity pluginActivity;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.e("ard", "替身：onCreate()");
        super.onCreate(savedInstanceState);
    
        String className = getIntent().getStringExtra("className");
        Log.e("ard", "替身：拿到插件aty：" + className);
        try {
            Class<?> aClass = PluginManager.getInstance().getDexClassLoader().loadClass(className);
            Object instance = aClass.newInstance();
            if (instance instanceof IPluginActivity){
                pluginActivity = (IPluginActivity) instance;
                pluginActivity.attach(this);
                Bundle bundle = new Bundle();
                pluginActivity.onCreate(bundle);
                Log.e("ard", "替身：插件aty是IPluginActivityLifecycle");
            }else{
                Log.e("ard", "替身：插件aty 不是 IPluginActivityLifecycle");
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        }
    }
    
    @Override
    public void setContentView(int layoutResID) {
        Log.e("ard", "替身：super.setContentView(layoutResID)");
        super.setContentView(layoutResID);
        // pluginActivity.setContentView(layoutResID); // 死循环
    }
    
    @Override
    public void setContentView(View view) {
        Log.e("ard", "替身：super.setContentView(view)");
        super.setContentView(view);
        // pluginActivity.setContentView(view); // 死循环
    }
    
    @Override
    protected void onSaveInstanceState(@NonNull Bundle outState) {
        Log.e("ard", "替身：onSaveInstanceState(outState)");
        super.onSaveInstanceState(outState);
        pluginActivity.onSaveInstanceState(outState);
    }
    
    @Override
    protected void onStart() {
        Log.e("ard", "替身：onStart()");
        super.onStart();
        pluginActivity.onStart();
    }
    
    
    public void onRestart() {
        Log.e("ard", "替身：onRestart()");
        super.onRestart();
        pluginActivity.onRestart();
    }
    
    public void onResume() {
        Log.e("ard", "替身：onResume()");
        super.onResume();
        pluginActivity.onResume();
    }
    
    public void onPause() {
        Log.e("ard", "替身：onPause()");
        super.onPause();
        pluginActivity.onPause();
    }
    
    public void onStop() {
        Log.e("ard", "替身：onStop()");
        super.onStop();
        pluginActivity.onStop();
    }
    
    public void onDestroy() {
        Log.e("ard", "替身：onDestroy()");
        super.onDestroy();
        pluginActivity.onDestroy();
    }
    
    @Override
    public ClassLoader getClassLoader() {
        Log.e("ard", "替身：getClassLoader()");
        return PluginManager.getInstance().getDexClassLoader();
    }
    
    @Override
    public Resources getResources() {
        Log.e("ard", "替身：getResources()");
        return PluginManager.getInstance().getResources();
    }
    
    @Override
    public void startActivity(Intent intent) {
        Log.e("ard", "替身：startActivity(i)");
        String className = intent.getStringExtra("className");
        Intent i = new Intent(this, GhostActivity.class);
        i.putExtra("className", className);
        super.startActivity(i);
    }
}

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import android.content.Intent;

import android.content.res.Resources;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import androidx.annotation.NonNull;

import androidx.appcompat.app.AppCompatActivity;

import com.cuiweiyou.middleman.IPluginActivity;

import com.cuiweiyou.middleman.PluginManager;

* 替身Activity。通过这个aty跳转到插件的aty。

* 必须注册到宿主的Manifest。

public class GhostActivity extends AppCompatActivity {

private IPluginActivity pluginActivity;

@Override

protected void onCreate(Bundle savedInstanceState) {

Log.e("ard", "替身：onCreate()");

super.onCreate(savedInstanceState);

String className = getIntent().getStringExtra("className");

Log.e("ard", "替身：拿到插件aty：" + className);

try {

Class<?> aClass = PluginManager.getInstance().getDexClassLoader().loadClass(className);

Object instance = aClass.newInstance();

if (instance instanceof IPluginActivity){

pluginActivity = (IPluginActivity) instance;

pluginActivity.attach(this);

Bundle bundle = new Bundle();

pluginActivity.onCreate(bundle);

Log.e("ard", "替身：插件aty是IPluginActivityLifecycle");

}else{

Log.e("ard", "替身：插件aty 不是 IPluginActivityLifecycle");

}

} catch (ClassNotFoundException e) {

e.printStackTrace();

} catch (IllegalAccessException e) {

e.printStackTrace();

} catch (InstantiationException e) {

e.printStackTrace();

}

@Override

public void setContentView(int layoutResID) {

Log.e("ard", "替身：super.setContentView(layoutResID)");

super.setContentView(layoutResID);

// pluginActivity.setContentView(layoutResID); // 死循环

}

@Override

public void setContentView(View view) {

Log.e("ard", "替身：super.setContentView(view)");

super.setContentView(view);

// pluginActivity.setContentView(view); // 死循环

}

@Override

protected void onSaveInstanceState(@NonNull Bundle outState) {

Log.e("ard", "替身：onSaveInstanceState(outState)");

super.onSaveInstanceState(outState);

pluginActivity.onSaveInstanceState(outState);

}

@Override

protected void onStart() {

Log.e("ard", "替身：onStart()");

super.onStart();

pluginActivity.onStart();

}

public void onRestart() {

Log.e("ard", "替身：onRestart()");

super.onRestart();

pluginActivity.onRestart();

}

public void onResume() {

Log.e("ard", "替身：onResume()");

super.onResume();

pluginActivity.onResume();

}

public void onPause() {

Log.e("ard", "替身：onPause()");

super.onPause();

pluginActivity.onPause();

}

public void onStop() {

Log.e("ard", "替身：onStop()");

super.onStop();

pluginActivity.onStop();

}

public void onDestroy() {

Log.e("ard", "替身：onDestroy()");

super.onDestroy();

pluginActivity.onDestroy();

}

@Override

public ClassLoader getClassLoader() {

Log.e("ard", "替身：getClassLoader()");

return PluginManager.getInstance().getDexClassLoader();

}

@Override

public Resources getResources() {

Log.e("ard", "替身：getResources()");

return PluginManager.getInstance().getResources();

}

@Override

public void startActivity(Intent intent) {

Log.e("ard", "替身：startActivity(i)");

String className = intent.getStringExtra("className");

Intent i = new Intent(this, GhostActivity.class);

i.putExtra("className", className);

super.startActivity(i);

}

4.2.启动插件

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import com.cuiweiyou.middleman.PluginManager;

public class MainActivity extends AppCompatActivity {
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    
    // 布局中控件点击事件
    public void runPlugin(View view) {
        PluginManager.getInstance().setContext(this);
        PluginManager.getInstance().loadPluginApkFile("/sdcard/ddd.apk"); // sd卡上的插件apk。申请权限略。
        
        String launcherActivityName = PluginManager.getInstance().getPackageInfo().activities[0].name; // 插件入口
        Intent intent = new Intent(this, GhostActivity.class); // 替身
        intent.putExtra("className", launcherActivityName); // 告诉替身插件的入口
        startActivity(intent); // 启动替身
    }
}

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import com.cuiweiyou.middleman.PluginManager;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

// 布局中控件点击事件

public void runPlugin(View view) {

PluginManager.getInstance().setContext(this);

PluginManager.getInstance().loadPluginApkFile("/sdcard/ddd.apk"); // sd卡上的插件apk。申请权限略。

String launcherActivityName = PluginManager.getInstance().getPackageInfo().activities[0].name; // 插件入口

Intent intent = new Intent(this, GhostActivity.class); // 替身

intent.putExtra("className", launcherActivityName); // 告诉替身插件的入口

startActivity(intent); // 启动替身

}

- end

声明

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